Bakha Wofiyira Wofiyira (Dendrocygna bicolor) amakhala kumadera otentha kwambiri ku America, Africa ndi South Asia. Posankha ma biotopu, abakha awa amawonetsa mawonekedwe apadera apulogalamu, akusankha malo osungirako amadzi ambiri osiyanasiyana omwe ali pachidikha: nyanja, mitsinje, malo owumitsanso ang'onoang'ono, zithaphwi, kutulutsa. Nthawi zambiri, abakha omwe ali ndi utoto wokhazikika amakhala m'malo omwe udzu wobiriwira udapangidwa bwino, amapezeka nthawi zambiri m'minda ya mpunga.
Kuswana
Chisa cha abakha awa ndi nsanja yaudzu yokhala ndi thireyi, yophimbidwa bwino m'mitengo yazomera zotuluka m'madzi - mabango, malo ogulitsa, mabango, mpunga, maluwa. Pankhaniyi, chisa nthawi zambiri chimakhala chofewa kwambiri, chosakhazikika pansi. Nthawi zambiri, amasankha mabowo amitengo ya bakha ena ambiri. Kugona kwathunthu kumakhala ndi mazira 12-14, makulitsidwe kumatenga masiku 24-26. Mbalame zonse ziwiri zimalowa mosiyanasiyana, zomwe zimakhala zachilendo pakati pa abakha. Anapiye amtundu wamtundu amangochoka atangobadwa kumene ndikutsatira makolo awo, kubisala kwa udzu wowuma. Yaimuna ndi yaikazi imatsogolera ana ake pamodzi, mpaka anapiyewo atakhala ndi mapiko (izi zimachitika pafupifupi masiku a 63-65).
Chakudya chopatsa thanzi
Mabakha aku whistling amadyetsa komanso mabakha amtsinje: mbalame imasefa m'madzi apamwamba, imamiza mutu mmenemo kapena kugubuduza theka kumtunda kwa thupi. Kuphatikiza apo, amathira pansi pamadzi, kupitilira mphindi 15. Gawo lalikulu lazakudya chazungu zomwe zimayamwa ndi zakudya zamtchire, limadya mbewu ndi zipatso zamadzi am'madzi komanso zam'mera, monga okonza mapiri ndi clover wokoma, amakonda kudya m'minda yamipunga yomwe imasefukira, pomwe nthawi zambiri amakhala ndi magulu ambiri. Abakha amadyeranso mababu ndi ma nthangala, mphukira, masamba a nzimbe, udzu wokhotakhota, ndi zomera zina za herbaceous.
Kufotokozera
Bakha lamitengo yayitali: kutalika konse kwa 45-53 masentimita, amuna amalemera 621-755 g, zazikazi zolemera 631-739 g. Thupi - lalitali, lalitali ndi miyendo yayitali - likufanana ndi tsekwe osati bakha wamba. Vuto lina lomwe limasiyanitsa abakha onse amitengo, kuphatikiza yofiira, ndi mapiko ake otambalala ndi ozungulira, chifukwa choti kuthawa kwawo kumayamba kuchepa komanso mozama, monga ma bedi. Kufanana ndikumapeto mumlengalenga kumatsimikizidwanso ndi khosi lalitali ndi miyendo kutuluka kupitirira mchira. Monga mitundu ina ya abakha, whisting yokhala ndi tsitsi loyera imasungidwa m'matumba, komabe, mosiyana ndi ena, sizipanga dongosolo lililonse mwakuwuluka. Mutu ndi wowumbidwa ndi peyala, mchira wake ndi waufupi.
Monga dzinalo likunenedzera, ma plamu amawongoleredwa ndi mtundu wofiira, kapena m'malo mwake, wofiirira, womwe umapezeka pamutu, khosi, chifuwa, m'mimba ndi m'mbali. Palibe mawonekedwe pamwamba ofiira pamitundu yomwe idalembedwa, kupatula khosi lopepuka pang'ono, pomwe pali timadontho tofiirira. Nthenga zazitali za kumtunda kwa m'mbali ndi chovala chovalachi ndi utoto wonyezimira-wokhala ndi malekezero a bulauni. Kumbuyo ndi ntchentche zakuda ndi zofiirira zakuda ndi njira yazowonekera. Bill ndi wakuda, miyendo ndi imvi. Akuluakulu amuna ndi akazi pafupifupi samasiyana wina ndi mnzake, kupatula kuti omaliza ndi ochepa pang'onopang'ono ndipo amapakidwa pang'onopang'ono. Mbalame zazing'ono sizimasiyana kunja ndi akulu.
Dera
Malowa ali ndi magawo angapo mu Old and New Worlds. Ku North America, amakhala kumwera kwa US - Florida, Texas ndi Louisiana, ndipo ku Mexico kumwera kukafika ku Oaxaca ndi Tabasco. Mpaka posachedwa, malo okhala ku Greater Antilles. Ku South America, kuli magawo awiri akutali a masanjidwewo: amodzi amakhala kumpoto kwa kontrakitala kuchokera ku Colombia kummawa mpaka ku Guyana, enanso chapakati kuyambira ku Brazil mpaka kumwera kupita kuchigawo cha Argentina cha Tucuman ndi m'chigawo cha Brazil cha Buenos Aires. Dera logawika ku Africa kumwera kwa Sahara: bakha ochokera ku Senegal kum'mawa mpaka ku Ethiopia, kumwera kwa Botswana Lake Ngami ndi dera la South Africa la KwaZulu-Natal. Kuphatikiza apo, bakha ndiofala ku Madagascar. Pomaliza, dera la Asia limafotokoza India ndi Myanmar.
Imaganiziridwa kuti ndi mitundu yokhazikika. Ku Africa, kusamukira kosakhazikika kumachitika chifukwa cha kuuma kwa matupi amadzi kapena kuchepa kwa chakudya. Kutengera kuti bakha amatha kukhazikika m'malo amodzi nthawi imodzi komanso pamitunda yayikulu, akuti ndiwosavuta kwambiri ndipo akukonzekera kusamukira ku magawo atsopano. Chiphunzitso ichi chimathandizidwanso ndi kusapezeka kwa kusiyana kwa zigawo ndi gawo lalikulu komanso long'ambika. Maulendo apamtunda osadziwika bwino amadziwika ku Canada, kumpoto chakum'mawa kwa United States, Hawaii, Morocco, Spain, kumwera kwa France ndi Nepal. Mbalame ku India nthawi zina zimawulukira ku Sri Lanka.
Habitat
Posankha ma biotopu, amawonetsa mawonekedwe apadera apulasitiki, kusankha malo osungirako amadzi ambiri osiyanasiyana omwe ali pachidikha: nyanja, mitsinje, yaying'ono, kuwuma malo osungira, madambo, kutulutsa. Nthawi zambiri, imakhala m'malo omwe msipu wamtchire umapangidwa bwino. Nthawi zambiri, bakha amapezeka m'minda ya mpunga yomwe idasefukira.